earth resistance soil resistivity tester an iso 9001:2008 ... resistance...01 ® ® 02 thanks for...
TRANSCRIPT
An ISO 9001:2008 Company
®
All Specifications are subject to change without prior notice
D:\Chhaya\My Documents\Chhaya\backup\catlog\New Cat\KM 1320-3000B.cdr
Earth Resistance Soil Resistivity Tester
2 / 3 / 4 Wire Model KM 1320
? Function : Measurement of 2/3/4-pole earth resistance, soil resistivity, earth voltage, AC voltage
? Measurement Range : Earth Resistance: 0.00Ω-30.00kΩ
Soil Resistivity: 0.00Ω-9000kΩ
? Measuring Mode : Precise 4-pole measurement, 3-pole measurement, simple 2-pole measurement
? Measuring Method : Earth Resistance: rated current change-pole method, measurement current 20mA Max
Soil Resistivity: 4-pole measurement
Earth Voltage: average rectification(between P(S)-ES)
? Test Frequency : 128Hz/111Hz/105Hz/94Hz(AFC)
? Short-circuit Test Current : AC 20mA max
? Open-circuit Test Current : AC 40V max
? Test Voltage Wave : Sine wave
? Electrode Distance Range : Can be set 1m-100m
? Shift : Earth Resistance: 0.00Ω-30.00kΩ, automatic shift
Soil Resistivity: 0.00Ω-9000kΩ, automatic shift
? Backlight : Blue screen backlight, suitable for dim places
? Display Mode : 4-digital super-large LCD display, blue screen backlight
? Measuring Indicator : During measurement, LED flash indicator, LCD count down display, progress bar indicator
? LCD Frame Dimension : 128mm×75mm
? LCD Window Dimension : 124mm×67mm
? Standard Test Wire : 4 wires: each for red 20m, black 20m, yellow 10m, and green 10m
? Simple Test Wire : 2 wires: each for red 1.6m and black 1.6m
? Auxiliary Earthing Rod : 4 rods: Φ10mm×150mm
? Measuring Rate : Earth voltage: about 3 times/second
Earth resistance, soil resistivity: about 5 seconds/time
? Line Voltage : below AC 600V
KM 1320 Earth Resistance Soil Resistivity Tester is specially
designed and manufactured for measuring earth resistance, soil
resistivity, earth voltage, AC voltage. Adopting the latest digital
and micro-processing technology, precise 4-pole, 3-pole and
simple 2-pole method for earth resistance measurement,
importing FFT and AFC technology, with a unique function of
anti-interference capability and the ability to adapt to the
environment, consistency of repeat testing, to ensure high
precision, high stability and reliability for prolonged measure,
which is widely used in electric power, telecommunications,
meteorology, oil field, construction, lightning protection,
industrial electrical equipment and other earth resistance, soil
resistivity, earth voltage, AC voltage measurement.
KM 1320 Earth Resistance Soil Resistivity Tester is composed
of host machine, monitoring software, testing wires, auxiliary
ground pillars, communication wires and others. The large LCD
display of host machine is with blue backlight & bar graph
indicating that can be seen clearly. At the same time it can
store 300 sets of data, fulfilling historical inquiry and online real-
time monitoring through monitoring software, dynamic display,
alarm indicator, and with the functions like historical data
access, reading, preservation, report forms, printing and so on.
GENERAL SPECIFICATIONS :
All Specifications are subject to change without prior notice
D:\Chhaya\My Documents\Chhaya\backup\catlog\New Cat\KM 1320-3000B.cdr
? Measuring Times : Over 5000 times (Short-circuit test, interval time should be at least 30 seconds)
? RS232 Interface : RS232 interface, software supervision, storage data can be uploaded to
computer, saved or printed.
? Communication Wire : One piece of RS232 communication wire, with length 1.5m
? Data Storage : 300 sets, “MEM” icon storage indicator, flash display “FULL” icon to indicate storage is full
? Data Hold : Data hold function: “HOLD” icon display
? Data Access : Data read function: “READ” icon display
? Overflow Display : Exceeding measuring range overflow function: “OL” icon display
? Interference Test : Recognize interference signal automatically, “NOISE” icon display when interference
voltage exceed 5V
? Auxiliary Earthing Test : Can measure auxiliary earth resistance, 0.00KΩ-30kΩ(100R+rC<50kΩ, 100R+rP<50kΩ)
? Operating Temperature & Humidity : -10? -40? , below 80%rh
? Storage temperature & humidity : -20? -60? , below 70%rh
? Alarm Function : When measuring value exceeds alarm setting value, there is alarm Sound
? Battery Voltage : When battery voltage decreases to about 7.5V, battery voltage low icon will display,
reminding to replace battery.
? Overload Protection : Measuring earth resistance: between each interfaces of C(H)-E、P(S)-ES,
AC 280V/3 seconds
? Insulation Resistance : Over 20MΩ (between circuit and enclosure it is 500V)
? Withstanding Voltage : AC 3700V/rms (Between circuit and enclosure)
? Electromagnetic Features : IEC61326(EMC)
? Protection Type : IEC61010-1 (CAT Ⅲ 300V、CAT IV 150V、Pollution 2), IEC61010-031, IEC61557-1
(Earth resistance), IEC61557-5 (Soil resistivity), JJG 366-2004
? Power Consumption : Standby: about 20mA (Backlight shut off)
Boot and with backlight: about 45mA (25mA without backlight)
Measurement: about 100mA (Backlight shut off)
? Power Supply : DC 9V(Zi-Mn dry battery R14S 1.5V 6 PCS, continuous standby for 300 hours )
? Weight : 4.5kg (including package)
? Dimension : 215(L)×190(W)×95(H)mm
? Accessories : Standard testing wire 4nos., Simple testing wire 2nos., earth rods 4pcs., Battery, Manual
Software CD, RS232 Communication cable & Carrying case.
ELECTRICAL SPECIFICATIONS :
a＞20h a＞20h
1. Base Conditions and Working Conditions
Influence Quantity Working ConditionsBase Condition
Ambient Temp 23°C±1°C
Ambient Humidity 40%-60%
Working Voltage 9V±0.1V 9V±1.5V
＜80%
-10°C-40°C
Auxiliary Earth Resistance ＜100Ω ＜30kΩ
Interference Voltage no ＜20V
Interference Current no ＜2A
Electrode Distance when measuring R a＞5d a＞5d
Electrode Distance
when measuring ρ
G-17, Bharat Industrial Estate, T. J. Road, Sewree (W), Mumbai - 400 015. INDIA.Sales Direct.: 022 -2 4156638, Tel. : 022-24124540, 24181649, Fax : 022 - 24149659Email : [email protected], Website : www.kusamelectrical.com,
All Specifications are subject to change without prior notice
D:\Chhaya\My Documents\Chhaya\backup\catlog\New Cat\KM 1320-3000B.cdr
An ISO 9001:2008 Company
®
Intrinsic Error ResolutionMeasurement Range
3. Intrinsic error and performance indicators under base conditions
Category
0.00Ω-30.00Ω ±2%rdg ± 3dgt 0.01Ω
30.0Ω-300.0Ω ±2%rdg ± 3dgt 0.1Ω
300Ω-3000Ω ±2%rdg ± 3dgt 1Ω
3.00kΩ-30.00kΩ ±4%rdg ± 3dgt 10Ω
Soil Resistivity (ρ)
0.00Ω-99.99Ω
According to the precision of R
(ρ=2πaRa:1 m-100m,
π=3.14)
0.01Ω
100.0Ω-999.9Ω 0.1Ω
1000Ω-9999Ω 1Ω
10.00kΩ-99.99kΩ 10Ω
100.0kΩ-999.9kΩ 100Ω
1000kΩ-9000kΩ 1kΩ
Earth Voltage AC 0.0-600V ±2%rdg ± 3dgt 0.1V
Earth Resistance(R)
4. Field Application
G 17, Bharat Industrial Estate, T. J. Road, Sewree (W), Mumbai - 400 015. INDIA.
Sales Direct : (022) 24156638Tel. : (022) 24124540, 24181649. Fax : (022) 24149659
Email : [email protected] Website : www.kusamelectrical.com
www.kusam-meco.co.in
®MODEL - KM 1320
OPERATION MANUAL
®®
AN ISO 9001:2008 COMPANY
EARTH RESISTANCE
SOIL RESISTIVITY
TESTER
® ®
EARTH RESISTANCE
SOIL RESISTIVITY TESTER
MODEL - KM 1320
CONTENTWarning.............................................................................I. Introduction...............................................................II. Technical Specifications.......................................... 1. Base Conditions and Working Conditions............. 2. General Specification............................................ 3. Intrinsic error and performance indicators under base conditions......................................................III. Tester Structure........................................................IV. LCD Display..............................................................V. Measuring Principle..................................................VI. Operation Methods................................................... 1. Switch On/Off......................................................... 2. Battery Voltage Check........................................... 3. AC Voltage Measurement...................................... 4. Earth Voltage Measurement.................................. 5. 4-wires Precise Earth Resistance Measurement... 6. 3-Wires Earth Resistance Measurement............... 7. 2-Wires Simple Measurement................................ 8. Soil Resistivity Measurement................................. 9. Backlight Control.................................................... 10. Alarm Settings...................................................... 11. Data Lock/Storage................................................ 12. Data Reading/Deletion......................................... 13. Data Upload.........................................................VII. Battery Replacement................................................VIII. Accessories...............................................................IX. Test Certificate..........................................................X. Warranty....................................................................
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®®KM 1320 EARTH- TESTERr
(2/3/4 WIRES)
01
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Thanks for you purchase of KM 1320 Earth Resistance Soil Resistivity Tester of our company. For better use of the product, please make sure:
®®
WARNING
––to read this user manual in details.––to abide by the safety regulations and precautions strictly.
The tester is conforming to IEC61010 on design, production and test.Under any circumstance, it shall pay special attention on safetyin use of this tester.Pay attention to words and symbols stick on the Tester.It shall make sure that tester and accessories are in good condition before use; it can be used only when there is no damaged, naked or broken part in testing wires or insulation layer.During measurement, it is forbidden to touch bare conductorsand circuit under measurement.Before measurement, please confirm whether rotaryswitch has been set within the proper measuring range.Confirm that connector plug of lead has been inserted in thetester interface closely.Please don’t impose over 600V A.C. or D.C. voltage on the partbetween testing end and interface. Otherwise, it may have damage on the tester.Please don’t measure in an inflammable place. The flame sparkle maybe cause explosion.
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FUNCTION
During usage of tester, please stop using it when exposed metal is caused by broken enclosure or testing wires.Please don’t keep or store the tester in the spot with high-temperature and moisture, or condensation, and under directdaylight radiation for a long time.If the instrument is damp, please dry it before keeping.For replacing battery, please confirm testing wire has moved apart the meter, and rotary switch is in “OFF” position.Please put the used batteries in appointed collection place.The Tester has no auto shut-off function. Please set rotary switch to “OFF” after usage.When the meter displays battery low voltage symbol , and you need to replace the battery in time.If the Tester is not going to be used for a long period, remove thebattery.Pay attention to measuring range and usage environment stipulated for the Tester.This measuring device is only to be used, disassembled, adjusted and repaired by qualified personnel with authorization.When it may cause hazard by continuous use for the reason ofthe Tester itself, it shall immediately stop using it and deposit it at once, leaving it for disposal by authorized agency.For risk of danger icon in manual “ ”, users must perform safetyoperations strictly in compliance with the manual content.
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FUNCTION
FUNCTION
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03
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I. INTRODUCTION :
-3-
KM 1320 Earth Resistance Soil ResistivityTester is specially designed and manufactured for measuring earth resistance, soil resistivity, earth voltage, AC voltage. Adopting the latest digital and micro-processing technology, precise 4-pole, 3-pole and simple 2-pole method for earth resistance measurement, importing FFT and AFC technology, with a unique function of anti-interference capability and the ability to adapt to the environment, consistency of repeat testing, to ensure high precision, high stability and reliability for prolonged measure, which is widely used in electric power, telecommunications, meteorology, oil field, construction, lightning protection, industrial electrical equipment and other earth resistance, soil resistivity, earth voltage, AC voltage measurement.
®®
KM 1320 Earth Resistance Soil ResistivityTester is composed of host machine, monitoring software, testing wires, auxiliary ground pillars, communication wires and others. The large LCD display of host machine is with blue backlight and bar graph indicating that can be seen clearly. At the same time it can store 300 sets of data, fulfilling historical inquiry and online real-time monitoring through monitoring software, dynamic display, alarm indicator, and with the functions like historical data access, reading, preservation, report forms, printing and so on.
®®
KM 1320 Earth Resistance Soil ResistivityTester also named : Precise Earth Resistance Tester, 4-pole Earth Resistance Tester, 2/3/4-pole Earth Resistance Tester, Soil Resistivity Tester.
®®
II. TECHNICAL SPECIFICATIONS :
1. Base Conditions and Working Conditions :
Influence QuantityBase
ConditionWorking
ConditionRemark
Ambient Temp
Ambient Humidity
Working Voltage
Auxiliary Earth Resistance
Interference Voltage
Interference Current
Electrode Distance when
measuring R
Electrode Distance when
measuring P
23ºC ± 1ºC
40%-60%
9V ± 0.1V
<100W
no
no
a>5d
a>20h
-10ºC-40ºC
<80%
9V ± 1.5V
<30W
<20V
<2A
a>5d
a>20h
----
----
rC, rP
----
----
----
----
2. GENERAL SPECIFICATION :
Function
Power Supply
Measurement Range
Measuring Mode
Measuring Method
Test Frequency
Short-cicuit Test Current
Open-circuit Test Current
Test Voltage Wave
Electrode Distance Range
Measurement of 2/3/4-pole earth resistance, soil resistivity, earth voltage, AC voltageDC 9V (Zi-Mn dry battery R14S 1.5V 6 PCS, continuous standby for 300 hours)
Earth Resistance : 0.00W-30.00kW
Soil Resistivity : 0.00Wm-9000kWm
Precise 4-pole measurement, 3-pole measurement, simple 2-pole measurementEarth Resistance : rated current change-pole method,measurement current 20mA MaxSoil Resistivity : 4-pole measurement (Wenner method)Earth Voltage : average rectification (between P(s)-ES)128Hz/ 111Hz/ 105Hz/ 94Hz (AFC)AC 20mA maxAC 40V maxSine waveCan be set 1m-100m
05
® ®
06
Earth Resistance : 0.00W-30.00kW, automatic shift
Soil Resistivity : 0.00Wm-9000kWm, automatic shift
Blue screen backlight, suitable for dim places4-digital super-large LCD display, blue screen backlightDuring measurement, LED flash indicator, LCD count down display, progress bar indicator
´128mm 75mm´124mm 67mm
L W H : 215mm 190mm 95mm
4 wires : each for red 20m, black 20m, yellow 10m, andgreen 10m2 wires : each for red 1.6m and black 1.6m
´4 rods : F10mm 150mm
Earth voltage : about 3 times/ secondEarth resistance, soil resistivity : about 5 seconds/ timeOver 5000 times (Short-circuit test, interval time shouldbe at least 30 seconds)below AC 600VPossess Rs232interface, software supervision, storagedata can be uploaded to computer, saved or printed.One piece of Rs232 communication wire, with length1.5m300 sets, “ ” icon storage indicator, flash display “ ” icon to indicate storage is fullData hold function : “ ” icon displayData read function : “ ” icon displayExceeding measuring range overflow function : “ ”icon displayRecognize interference signal automatically, “ ”icon display when interference voltage exceed 5V
Can measure auxiliary earth resistance, 0.00kW-30kW
(100R + rC<50kW, 100R + rP<50kW)
When measuring value exceeds alarm setting value, there is “Toot-toot-toot” alarm hint
Shift
Backlight
Display Mode
Measuring Indicator
LCD Frame Dimension
LCD Window Dimension
Dimension
Standard Test Wire
Simple Test Wire
Auxiliary Earthing Rod
Measuring Rate
Measuring Times
Line Voltage
RS 232 Interface
Communication Wire
Data Storage
Data Hold
Data Access
Overflow Display
Interference Test
Auxiliary Earthing Test
Alarm Function
MEMFULL
HOLDREAD
OL
NOISE
Battery Voltage
Power Consumption
Weight
Working Temperature &
Humidity
Storage Temperature &
Humidity
Overload Protection
Insulation Resistance
Withstanding Voltage
Electromagnetic
Features
Protection Type
When battery voltage decreases to about 7.5V, batteryvoltage low icon will display, reminding to replacebattery.Standby : about 20mA (Backlight shut off)Boot and with backlight about 45mA (25mA without backlight)Measurement : about 100mA (Backlight shut off)Total weight : 4.5kg (including package)Tester : 1443g (including battery)Testing wires : 1560gAuxiliary earthing rods : 935g (4pcs)-10ºC-40ºC, below 80%rh
-20ºC-60ºC, below 70%rh
Measuring earth resistance : between each interfaces
of C(H)-E, P(S)-ES, AC 280V/3 secondsOver 20MW (between circuit and enclosure it is 500V)
AC 3700V/rms (Between circuit and enclosure)IEC61326 (EMC
IEC61010-1 (CAT III 300V, CAT IV 150V, Pollution 2),IEC61010-031, IEC61557-1 (Earth resistance),IEC61557-5 (Soil resistivity), JJG 366-2004
– +
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3. Intrinsic error and performance indicators under base conditions
Category Measurement Range Intrinsic Error Resolution
Earth
Resistance
(R)
Soil Resistivity
(r)
Earth Voltage
0.00W-30.00kW
30.0W-300.0kW
300W-3000kW
3.00W-30.00kW
0.00W-99.99kW
100.0W-999.9kW
10000W-9999kW
10.00W-99.99kW
100.0W-999.9kW
1000W-9000kW
AC 0.0-600V
±2%rdg ± 3 dgt
±2%rdg ± 3 dgt
±2%rdg ± 3 dgt
±4%rdg ± 3 dgt
According to
the precision of
R
(r = 2paR
a : 1 m-100m,
p = 3.14)
± 2%rdg ± 3 dgt
0.01W
0.1W
1W
10W
0.01Wm
0.1Wm
1Wm
10Wm
100Wm
1kWm
0.1V
Note :1. When rC max or rP max, additional error <± 3%rdg ± 5 dgt.
(rC max : 4kW + 100R <50kW, rP max : 4kW + 100R <50kW)2. When 5V interference voltage, additional error <± 5%rdg ± 5dgt.
III. TESTER STRUCTURE :
C(H)
E
P
ES
(S)
AC 600V Max
Rs232
6
7
8
4
9
10 11 12
H.i65
000
EARTH- TESTER(2/3/4 WIRES)
0
10 20 30
40
.C
MEM
AL CLR
SETSTART
FUNCTION
OFFEARTH
REARTH
EARTHVOLTAGE
OFF
C(H)
E
P
ES
(S)
AC 600V Max
Rs232
4 5
32
1
09
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10
1. LCD 2. Button area3. Rotary switch for selecting function 4. RS232 interface5. Interface of testing wires 6. P(S) interface: Voltage electrode7. C(H) interface: Current electrode 8. E interface: Earth electrode9. ES interface: Auxiliary earth electrode 10. Standard test wires11. Auxiliary earthing rods 12. Simple test wires
1. Progress bar (Dynamic display the progress of testing)2. Alarm symbol (Display when open alarm function, flash when exceed the alarm value)3. Exceed voltage symbol (Display when the measured voltage exceed 30V, please pay attention to the safety)4. AC symbol5. Data hold symbol (Display when press to hod data)6. Data access symbol (Display when long press for at least least 3 seconds to access data)7. Data storage symbol (Display when press to hold data and store)8. Interference signal symbol (Display when the interference voltage exceed 5V)9. Low battery symbol (Display when the battery voltage decreases to 7.5V)
MEM
MEM
MEM
10. Display the group number of stored data, and display countdown.11. Interference electrode symbol (Display when the electrode exceed 5V interference voltage)12. Measured data13. Voltage unit symbol
14. Resistance, soil resistivity, length unit symbol (W, k , m,
kWm, m)
WW
V. MEASURING PRINCIPLE :
1. Voltage to ground measurement adopts average value rectification method.2. Earth resistance measurement with fall-of-potential method. AC constant current I is applied between the measurement object E earth electrode and C(H) current electrode, and finding out the potential difference V between E earth electrode and P(S) voltage electrode, calculating the earth ground R according to formula R = V/I. To ensure the accuracy of test, designed the 4-wires method can eliminate influence of contact resistance (usually result from dirty or rusty) between measured earthing body, auxiliary earthing rods, test clips, meter’s input interface. The 4-wires method can also eliminate influence of line resistance.
Rated current generator
A~V
Voltmeter
Voltage electrode
P(S)
Current electrode
C(H)V=R I
R=V/I
I
E Earth eelctrode
IV. LCD DISPLAY :
H888
888810 20 30
400
. . .
.AC
H S
HOLDV
k m
READ
MEM
NOISE
1
2345
6
7
8
9
1011
12
13
14
®
1211
®
3. Maximum Operating Error : Operating error (B) is an error obtained within the rated operating conditions, and calculated with the intrinsic error (A), which is an error of the instrument used, and the error (E) due to variations.
A : Intrinsic errorE2 : Variation due to power supply voltageE3 : Variation due to temperature changeE4 : Variation due to interference voltage changeE5 : Variation due to contact electrode resistance
B = ± ( |A| + 1.15 E + E + E + E )2 3 4 5 2 2 2 2
4. Soil resistivity ( ) is measured by 4-pole method (Wenner method) : There is a AC current I between E earthing electrode and C(H) current electrode, find the potential difference V between P(S) voltage electrode and ES auxiliary earthing electrode, the potential difference V divided by AC current I is earth resistance R, electrode distance is a(m), then soil
resistivity can be got according to formula r=2paR(Wm). If the electrode distance of C(H)-P(S) is equal to P(S)-ES (both is a) that is for wenner method. In order to simple the calculation, please make electrode distance a far more than embedding depth h, generally should meet a>20h, as shown below.
r
Rated current generator
A~V
Voltmeter
P(S)ESE
a a a
h
>20h >20h >20h
a/2
0h
max
I
VI. OPERATION METHODS :
1. Switch On/Off :
Rotate rotary switch to fulfill switch on and off. When rotary switch button displays “OFF” for shut-off. The Tester has noauto shut-off function, so please shut it off after usage in case of battery consumption saving.
FUNCTION
2. Battery Voltage Check :
After switch on, if LCD displays low battery voltage icon “ ”,which indicates that battery voltage is low, and please replace the battery in compliance with instructions. Adequate battery power can ensure the accuracy of measurement.
– +
3. AC Voltage Measurement :
AC voltage measurement refers to the general commercial ACvoltage measurement, pay attention to the difference between earthing voltage, the meter can be used for testing below 600V ACline voltage.
As shown below. Firstly connect test wires with P(S), ES interface, secondly connect test wires with tested line, then rotate rotary switch to “EARTH VOLTAGE” and start testing, LCD will display the test results.
FUNCTION
Ac line voltage measurement can’t exceed 600V.Connect P(S) and ES interface to test commercial ACvoltage, no need to connect C(H) and E interface.
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H.i55
I i0
EARTH- TESTER
0
10 20 30
40
C
MEM
AL CLR
SETSTART
FUNCTION
OFFEARTHREARTH
EARTHVOLTAGE
OFF
C(H)
E
P
ES
(S)
AC 600V Max
Rs232
V
P(S)
ES
ESP(S)
GreenYellow
N L
4. Earth Voltage Measurement :
Earth voltage measurement need to use one auxiliaryearthing rod.The meter connect with the earth only by testing wiresand auxiliary earthing rods. Other tester wires of meter’s interface can’t connect with commercial power line L, N, otherwise may cause leakage, the breaker may start, it is dangerous.Earth voltage measurement can’t exceed 600V.
Earth voltage : That is a potential differences between zero potential differences and earthing equipment shell, earthing wires,earthing body when electrical equipment has a earthing fault. Earth voltage is the potential differences between the earth. As a reference point, the earth is zero potential.
Earth voltage measurement need to use one auxiliary earthing rod. Please pay attention to the difference from commercial ACvoltage measurement. As shown below : meter, auxiliary earthing rods, testing wires are all connected, rotate rotary switch to “EARTH VOLTAGE” and start testing, LCD will display the test results.
FUNCTION
H.i65
07 i
EARTH- TESTER
0
10 20 30
40
C
MEM
AL CLR
SETSTART
FUNCTION
OFFEARTH
REARTH
EARTHVOLTAGE
OFF
C(H)
E
P
ES
(S)
AC 600V Max
Rs232
V
P(S)
ES
ESP(S)
GreenYellow
.
Secondarycircuit
Transformer
Firstcircuit
Measured earthing body
Measuring earth voltage of commercial earthing body
5. 4-wires Precise Earth Resistance Measurement :
In the testing of earth resistance, should firstly confirmthe earth voltage of earthing wire, the voltage betweenC(H) and E or P(S) and ES must under 20V, the meter showing symbols when the earth voltage exceed5V, and the measured value of earth resistance may produce error. At this time, firstly interrupt power supply to earthing equipment, make sure the earthvoltage decrease, and then test earth resistance again.
NOISE
4-wires Measurement : The 4-wires method can eliminate influence of contact resistance (usually result from dirty or rusty)between measured earthing body, auxiliary earthing rods, test clips, meter’s input interface. The 4-wires method can also eliminate influence of line resistance. So it is better than 3-wiresmeasurement.
As shown below : Start from the measured body, interval 5m-20m, respectively insert P(S), C(H) auxiliary earthing rods deep into the earth in a straight line, and then connect testing wires (black,green, yellow, red) from E, ES, P(S), C(H) interfaces correspondingto measured earth electrode E, auxiliary voltage electrode P(S), auxiliary current electrode C(H).
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The distance from measured earthing body to currentelectrode C(H), should at least five times longer thanthe embedded depth of measured earthing body, or the embedded electrode depth (d).When measuring the total earth resistance of complexearthing system, d is the length of the biggest diagonal line of this earthing system.Testing wires can’t be winded together, or may affectthe measuring accuracy.
H.i65
07 i
EARTH- TESTER
0
10 20 30
40
C
MEM
AL CLR
SETSTART
FUNCTION
OFFEARTH
REARTH
EARTHVOLTAGE
OFF
C(H)
E
P
ES
(S)
AC 600V Max
Rs232
E
ES
P(S)Green
Yellow
.
Measured earthing body
Red
C(H)
Black
h
d>5d
For multi independent earthing system or larger earth net, 50m orlarger testing wire is optional, as shown below :
H.i65
i00
EARTH- TESTER
0
10 20 30
40
C
MEM
AL CLR
SETSTART
FUNCTION
OFFEARTH
REARTH
EARTHVOLTAGE
OFF
C(H)
E
P
ES
(S)
AC 600V Max
Rs232
.ES
Green
Black
>5d
C(H) P(S)
RedYellow
E
rC rPr1
r2r3 r4 r5 r6
d
R = r1//r2//r3//r4//r5//r6//....//rn (r1....rn are all independentearthing points) R–– The reading value on meter, the total earth resistance of theearthing system. r1...rn–– All are independent earthing points, each points have no connection together under the ground. rC–– The earth resistance rC of auxiliary current electrode C(H). rP–– The earth resistance rP of auxiliary voltage electrode P(s). n–– Number of independent earthing point, more points, smallerthe R value.
After finishing wires connection, firstly rotate rotaryswitch to “REARTH”, press “ ” button to start testing. Duringtesting, display countdown and process bar indicator. Stable earthresistance value is shown when finish testing.
FUNCTION
START
Press “ ” button, the earth resistance rC of auxiliary current electrode C(H) and earth resistance rP of auxiliary voltage electrodeP(S) will be displayed, and then automatically return display of measured earth resistance R.
SET
As shown below, the measured earth resistance is 2.05 , already stored 8 sets of data. The earth resistance rC of auxiliary
current electrode C(H) is 0.36K , the earth resistance rP of
auxiliary voltage electrode P(S) is 0.27KW.
W
W
H008
20510 20 30
400
.
.
036.
c:
k 027.
p:
k
17
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18
6. 3-Wires Earth Resistance Measurement :
3-wires measurement : As shown below, short-circuit ES and S interface, which is 3-wires measurement. The operation of meter isthe same with 4-wires measurement. The 3-wires method can’t eliminate influence of line resistance, also can’t eliminate influence of contact resistance between meter and testing wires, testing wires and auxiliary earthing rods. Meanwhile, oxidation layer on measured earthing body must be removed when measuring.
H.i65
07 i
EARTH- TESTER
0
10 20 30
40
C
MEM
AL CLR
SETSTART
FUNCTION
OFFEARTH
REARTH
EARTHVOLTAGE
OFF
C(H)
E
P
ES
(S)
AC 600V Max
Rs232
ES-EP(S)
Yellow
.
Measured earthing body
Red
C(H)
Black
d>5d
ES-E
>5d
7. 2-Wires Simple Measurement :
When select commercial use power supply system earth as auxiliary earth electrode, it must use detector to confirm that is it the earth ground electrode forcommercial use power supply system, otherwise thebreaker may start, it is dangerous.Using 2-wires simple method for measuring earthresistance, try to choose a earthing body which has asmall re value as auxiliary earthing electrode, so that the reading value is more close to the real value. The metal pipes, metal fire hydrant have priority in choosing auxiliary earthing electrodes.
2-wires method : This method is a simple method for measurement that does not use auxiliary earthing rod, taking the earth electrode with the minimal existing earth ground resistance value as auxiliary earth electrode, and connecting by two simple testing wires (in which C(H)-P(S), E-ES interfaces are in short circuit). It can make use of metal pipes, fire hydrants and other metal buried objects, common earthing of commercial electric power system or lightning protection earth ground electrode and others to replace auxiliary earthing rods C(H), P(S), and pay attention to remove oxide layer on the connection point of the selected metal auxiliary earthing object when making measurement.
Wire connection is as following figure, and refer to 4-wires measurement for other operations.
000
EARTH- TESTER
0
10 20 30
40
C
MEM
AL CLR
SETSTART
FUNCTION
OFFEARTH
REARTH
EARTHVOLTAGE
OFF
C(H)
E
P
ES
(S)
AC 600V Max
Rs232
E-ES
C(H)-P(S)
RedBlack
.C(H)-P(S)
E-ES
RX
Measured earthing body
Take metal pipe or building lighting proof earth as the auxiliary earth electrodes
000
EARTH- TESTER
0
10 20 30
40
C
MEM
AL CLR
SETSTART
FUNCTION
OFFEARTH
REARTH
EARTHVOLTAGE
OFF
C(H)
E
P
ES
(S)
AC 600V Max
Rs232
E-ES
C(H)-P(S)
RedBlack
.
Secondarycircuit
Transformer
Firstcircuit
Commercial earthing bodyMeasured earthing body
C(H)-P(S)
E-ES
RX re
19
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20
2-wires simple method for measurement of earth ground resistance, its reading on tester is the total value of earth ground resistance value of measured earthing object and that of commercial earthing object, that is : R = RX + re
In which : R is the tester reading value; RX is the earth ground resistance value of measured earthing object; re is the earth ground resistance value of common earthing object like commercial use power system. Then, the earth ground resistance value of measured earthing object is : RX = R – re
8. Soil Resistivity Measurement :
Soil resistivity ñ is a determining factor of earthing resistance ofearthing body. Different nature of the soil, there is a different soilresistivity. Even the same kind of soil, due to different temperature and water content and so on, the soil resistivity will correspondingly have a significant change. Therefore, in order to have a correct basis in the design of the earthing device, ensure the designed earthing device be more in accord with the need of practical work, soil resistivity measurement is very essential.
Soil resistivity is measured by 4-pole method (Wenner method) According to formula ñ=2ðaR(Ùm) calculating soil resistivity ñ, its unit is Ùm, in which : a––electrode distance R––soil resistivity between electrode P(S)-ES
4-pole method (Wenner method) : Connect testing wires as shown below, pay attention to the distance between auxiliary earthing rods, and the embedding depth. Respectively insert C(H), P(S), ES, E auxiliary earthing rods deep into the earth in a straight line, and then connect testing wires (red, yellow, green, black) corresponding to C(H), P(S), ES, E of interfaces and measured auxiliary earthing rods.
EESP(S)
GreenYellowRed
C(H)
Black
a>20h
h
H.i65
000
EARTH- TESTER
0
10 20 30
40
C
MEM
AL CLR
SETSTART
FUNCTION
OFFEARTH
REARTH
EARTHVOLTAGE
OFF
C(H)
E
P
ES
(S)
AC 600V Max
Rs232
. m
a>20h
a>20h
a/2
0 m
ax
Setting distance between auxiliary earthing rods : After finishingwires connection, firstly rotate rotary switch to ‘“ñEARTH”, long press “ ” button (about 3 seconds) to enter setting, short press “ ” button to move the cursor, press “ ” or “ ” button to change current data value (a range:1m-100m), then long press “ ” button to save the set a value, and return soil resistivity testing mode.
FUNCTION
SET
SET
SET
After setting a value, in soil resistivity testing mode, press the“ ” button to start testing, and countdown display testing process, stable soil resistivity value is shown when finish testing.
START
SET
As shown below, the measured soil resistivity is 53.38Ùm, alreadystored 157 sets of data. Press “ ” button, the earth resistance rC ofauxiliary current electrode C(H) and earth resistance rP of auxiliaryvoltage electrode P(S) will be displayed, and then automatically returndisplay of measured soil resistivity ñ.
H i57
533810 20 30
400
.
.
m 036.
c:
k 027.
p:
k
21
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22
9. Backlight Control :
After startup, press “ ” button to turn on or off backlight. Thebacklight function is suitable to dark spot, power consumption of backlight is about 25mA. It will default backlight turn-off for each startup.
¤
10. Alarm Settings :
After startup, rotate rotary switch to select function,press “ ” button for a brief time to open or shut off alarm function, press “ ” button for a long time (about 3 seconds) to enter alarm critical value settings, press “ ” or “ ” to change current digital, press “ ” button to move cursor and then press “ ” button to store and exit. When measurement value is larger than alarm critical settings value and it has opened alarm function, the tester will flash and display “ ” icon and give out “toot-toot-toot--” alarming sound.
FUNCTION
ALAL
AI
AI
11. Data Lock / Storage :
In test mode, press “ ” button for a brief time to lock current displayed data, showing “ ”, “ ” icon and automatically store with serial numbers. If storage is full, the tester will display “ ” icon, and then press button to remove lock.
MEM
HOLD MEM
FULL
As shown in the left figure below:The lock measurement data of soil resistivity is 53.38Ùm, as the 28th group of data storage.
––––––––
HOLDREAD
H028
533810 20 30
400
.
.
m
HOLD
MEM
12. Data Reading / Deletion :
In test mode, press “ ” button for a longer time (over 3 seconds) to enter data reading, press “ ” or “ ” button to select reading data group number by step value 1, press “ ” or “ ” button constantly to select reading data group number by step value 10. When the current data is earth resistance or soil resistivity, press “ ” button to read data value of rC, rP and a, then press “ ” button to exit from reading.
MEM
SET
MEM
On reading if there is no storage data, LCD will display “ ”,see the above right figure.
- - - -
Under data reading status, press “ ” button to enter data deletion, press “ ” or “ ” to select “ ” or “ ”, selecting “ ” and then pressing “ ” button for not deleting and return data reading status, selecting “ ” and then pressing “ ” button for deleting stored data and it will show as above right figure after deletion.
CLR
no yESno
yES
CLR
CLR
Notice : Operating data deletion will delete all the stored dataone-time, and unable to be restored. Please careful operation.
13. Data Upload :
The stored data can be uploaded to computer. Make goodconnection of computer with RS232 communication wire of the tester, switch on the tester and run monitoring software, and if the software displays that interface is open and the connection is successful, then it can read the stored historical data, upload to company and preserve.
Monitoring software has the function of online real-time monitoring and historical inquiry, dynamic display, with alarm value settings and alarm indicator, and the function of historical data access, reading, preserve, print and other functions.
23
® ®
24
VII. BATTERY REPLACEMENT :
Please don’t replace battery in flammable spot.Please don’t replace battery during measurement.Pay attention to battery polarity and specification, and don’t mix use of new and used battery to avoid damage on tester.When the enclosure of Tester is wet, please do not open battery cover.Please put the used batteries in appointed collectionplace.
1. Switch off; making sure that the Tester is under switch-off state.2. Loosen the four screws on battery cover at the bottom of the Tester, and open battery cover.3. Replace new battery, pay attention to battery polarity and specification, close battery cover, and fasten screw.4. Switch on verification, otherwise re-operate.
VIII. ACCESSORIES :
TesterTester BagAuxiliary Earthing RodStandard Testing Wire
Simple Testing Wire
Zinc-manganese Dry BatteryMonitoring Software DiskRS232 Communication CableManual/WarrantyCard/Qualification Certificate
1 PC1 PC4 PCS4 wires : each for red 20m, black20m, yellow 10m, and green 10m2 wires : each for red 1.6m andblack 1.6m6 PCS (R14S 1.5V)1 Copy1 PC1 Copy
25
® ®
26
MUMBAI
TEST CERTIFICATE
EARTH RESISTANCE
SOIL RESISTIVITY TESTER
This Test Certificate warrantees that the product has been
inspected and tested in accordance with the published
specifications.
The instrument has been calibrated by using equipment
which has already been calibrated to standards traceable
to national standards.
MODEL NO. ________________KM 1320
SERIAL NO. ___________
DATE: ___________
ISO 9001REGISTERED
QC
PASS
KUSAM-MECO
WARRANTY
Each “KUSAM-MECO” product is warranted to be free from defects in material and workmanship under normal use & service. The warranty period is one year (12 months) and begins from the date of despatch of goods. In case any defect occurs in functioning of the instrument, under proper use, within the warranty period, the same will be rectified by us free of charges, provided the to and fro freight charges are borne by you.This warranty extends only to the original buyer or end-user customer of a “KUSAM-MECO” authorized dealer.This warranty does not apply for damaged Ic’s, fuses, burnt PCB's, disposable batteries, carrying case, test leads, or to any product which in “KUSAM-MECO’s” opinion, has been misused, altered, neglected, contaminated or damaged by accident or abnormal conditions of operation or handling.“KUSAM-MECO” authorized dealer shall extend this warranty on new and unused products to end-user customers only but have no authority to extend a greater or different warranty on behalf of “KUSAM-MECO”.“KUSAM-MECO’s” warranty obligation is limited, at option, free of charge repair, or replacement of a defective product which is returned to a “KUSAM-MECO” authorized service center within the warranty period.THIS WARRANTY IS BUYER’S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. “KUSAM-MECO” SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA, ARISING FROM ANY CAUSE WHATSOEVER.All transaction are subject to Mumbai Jurisdiction.